JPH11237151A - Trapping body for snow making device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To beat down snow perfectly and easily by a method wherein a twisted wire, such as a wire rope or the like, is employed as a trapping body to reduce the adhering area of snow. SOLUTION: In a device for falling artificial snow, a twisted wire, such as a wire rope or the like, is employed as a trapping body for trap, grow and drop artificial snow. In this case, a wire rope 1, having the diameter of 0.5 mm, a total length of 1 m and made of stainless steel, is employed to manufacture a trapping body unit 3, in which wire ropes are tensed properly by springs 2 and are arranged with an equal distance, while a fine wire for impressing static electricity is arranged at the position of 30 cm immediately above the trapping body unit 3 and the voltage of -25 KVDC is impressed to form an electric field. The room temperature of a snow making chamber is retained at -15 deg.C and water particles are supplied on the trapping body unit 3 through a 2-fluid nozzle, injecting water and air, to trap the water particles. In a case when a twisted wire, such as a wire rope or the like, is employed as the trapping body, the diameter (d) of the wire rope within the range of 0 mm <d<=3 mm is optimum since the beat down performance of adhered snow is excellent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for dropping artificial snow, and more particularly to a catcher for catching, growing and dropping artificial snow.

[0002]

2. Description of the Related Art Japanese Patent Laying-Open No. 3-236575 discloses an apparatus for making artificial snow fall indoors. FIG. 2 is a diagram showing this device. 14 is a snow trap 15 is a snow generating room, 16
Is a cooler, 17 is a blower, 18 is a fog generator, and 19 is a beating body.

[0003] The feature of the trapping body of this device is that a snow trapping body 14 having a breathable film is used in a snowmaking room 15. The fog generated from the fog generator 18 freezes with the low-temperature air and adheres to the snow trap 14. And it has a mechanism to knock off snow by hitting from the back side of the attachment surface.

Next, Japanese Utility Model Laid-Open No. 5-40775 discloses that
An apparatus for dropping artificial snow in the form of powdered snow is disclosed for an environmental test room of an automobile, an experience dome in a low-temperature environment, and the like.

FIG. 3 shows this device. Reference numeral 20 denotes a cooling plate, 21 denotes a brush cooler, 22 denotes a brush, 23 denotes a pan humidifier, 24 denotes a blower, and 25 denotes a heater.

This device is disposed in a snow making room, and has a cooling plate 20 whose surface is cooled to a low temperature capable of forming frost, and a heater 25 which makes the atmosphere in the snow making room higher in temperature and humidity than the surface of the cooling plate.
And a humidifier 23, a blower 24 for circulating high-temperature and high-humidity air produced by the heater and the humidifier into the snowmaking chamber, and a brush 22 for scraping off the snow that has grown on the surface of the cooling plate 20.

The brush 22 scrapes off the snow that has grown on the surface of the cooling plate 20, thereby reproducing a snowfall scene having a "fluttering" feeling. Further, Japanese Unexamined Patent Publication No.
No. 210525, 09-49673 discloses a snow making method in which a high piezoelectric field is applied to charge water particles or ice particles, and the water particles or ice particles are captured by a capturing body and dropped.

This is shown in FIG. A is a direction in which supercooled water droplets or ice particles flow, 11 is an electrode for generating a high piezoelectric field, and 12 is a trap. In this method, as shown in FIG. 4, it is disclosed that a capturing body or a wire net having a projection is used as the capturing body 12.

[0009]

However, the above-mentioned prior art has the following problems. JP-A-3-236
In the wiping method using the apparatus shown in FIG. 2 disclosed in FIG. 575, water droplets are sprayed directly from a fluid nozzle, which is a mist generator 18, onto the trapping body 14 made of a gas permeable membrane and frozen on the gas permeable membrane. Due to the freezing force, the water droplets and the breathable film are firmly adhered to each other, and the snow grows on the breathable film.

[0010] Since a large amount of water droplets adhere to the air-permeable membrane, the adhesion area is large and the adhesion strength of the ice is increased. I do.

Therefore, if the operation is performed for a long time, the remaining snow gradually accumulates and causes clogging, so that the device does not function and a new snow melting mechanism such as a heater for melting the snow remaining in the trapping body. Is required.

In the method disclosed in Japanese Utility Model Laid-Open Publication No. 5-40775, which is shown in FIG. 3, the brush 22 is used to scrape off the snow frozen and adhered on the cooling plate 20 with the brush 22. Snow adheres, the brush becomes a snow mass, and the brush wiping performance deteriorates, and snow remains on the brush and the cooling plate.

Therefore, if the operation is performed for a long time, the remaining snow gradually accumulates, and a new snow melting mechanism such as a heater for melting the snow is required. Also, Japanese Unexamined Patent Publication No.
In the method disclosed in Japanese Patent Application Laid-Open No. 210525 / 09-49673 with the device shown in FIG. 4, since the capturing body 12 having the projection is used, the shape of the capturing body is very complicated, Since the area is large and the adhesion strength is large, it is not possible to completely remove the attached snow by the method of blowing off air or vibration, and a new snow melting mechanism such as a heater is required.

As described above, the capturing body used in the prior art is constituted by a planar capturing body or a capturing body having a complicated shape having a projection. That is, it is based on the reason that the trapping performance is improved as the trapping area of the trapping body is larger and the shape is more complicated, and the trapping efficiency of snow is improved.

However, in terms of wiping off, increasing the trapping area or complicating the shape increases the area of the snow-attached portion and increases the adhering force, thereby deteriorating the wiping-off performance.

Therefore, if the vehicle is operated for a long time, snow remains on the trapping body, and snow mass grows, causing clogging. Unless the snow is thawed, it will not be possible to maintain long-lasting performance.

Further, when the snow remaining by heating is melted,
Since the snowmelt water falls on the snow, the snowmaking equipment must be shielded from the room that uses snowmaking.Solutions cannot be solved simply by installing a heater or the like, and the equipment is large-scale. And increase costs. An object of the present invention is to solve these problems.

[0018]

The above object is achieved by the following means. The invention according to claim 1 is an apparatus for dropping artificial snow, wherein a stranded wire such as a wire rope is used as a catcher for capturing, growing and dropping artificial snow.

A second aspect of the present invention is an apparatus for dropping artificial snow, wherein a trapping unit having a plurality of stranded wires stretched in parallel, such as a wire rope, is used as a trapping body for trapping, growing and dropping the artificial snow. It is a capturing body of a snow making device characterized by being used.

Further, according to a third aspect of the present invention, after applying a high piezoelectric field to the sprayed supercooled water or ice particles, the supercooled water or ice particles are charged, then captured by a capturing body, and artificial snow grown on the capturing body is removed. The capturing body according to claim 1 or 2, which is used in a snow making device that is dropped.

The present invention has the following functions and features. As a method of improving the wiping performance of the trapping body and operating for a long time, a trapping body capable of minimizing the attachment area between the trapping body and artificial snow or water particles or ice particles was devised.

The fact that the capturing performance of each capturing body is lower than that of the conventional method is dealt with by increasing the number of capturing bodies. According to the present invention, the apparatus can be operated for a long time, and it is not necessary to provide a device such as a snow melting mechanism such as a heater.

In the present invention, a capturing unit is used in which a stranded wire such as a wire rope is tensioned using a spring and stretched in parallel at an appropriate interval. Since the surface area to which snow adheres is very small as compared with the conventional air-permeable membrane, cooling plate, and wire mesh, the adhesion of snow is small. After the snow grows on the capturing body, the stranded wire such as a wire rope is vibrated one by one continuously to repel the strings of the guitar, so that the snow attached to the stranded wire such as the wire rope can be completely and easily removed. Can be paid off.

Further, since a stranded wire such as a wire rope has less attenuation when vibrated than a conventional capturing body, the vibration is long and the sweeping effect is large. The stranded wire such as a wire rope has no apparent protrusion, but since it is a stranded wire, its cross-sectional shape is slightly uneven. In particular, when performing snowmaking using an electric field, since the lines of electric force are concentrated on the convex portions, a large amount of water particles or ice particles adhere to the convex portions, and the effect of increasing the snow capture rate is high. There is.

[0025]

FIG. 1 shows an example of an embodiment of the present invention.
This will be described below. Using a stainless steel wire rope 1 having a diameter of 0.5 mm and a total length of 1 m, a suitable tension is applied by a spring 2 to produce a capturing unit 3 which is stretched in parallel at equal intervals.
These were arranged vertically in two stages at positions where the directions of the wire ropes crossed.

Since the size of the snowflakes to be removed was set to 1 cm, the distance between the wire ropes was set to 2 cm. A thin line for applying static electricity was arranged at a position 50 cm directly above the capturing unit 3, and a voltage of minus 25 KVDC was applied to form an electric field.

The room temperature of the snow making room is set to -15 ° C., and the water particles are supplied onto the capturing unit by a two-fluid nozzle for jetting water and air to capture the water particles. 1cm after 10 minutes
When it grew to the extent, when the wire rope was vibrated one by one successively like a guitar string with a wooden stick,
All the snow on the wire rope could be removed.

Further, using a stainless steel wire rope having a diameter of 1 mm, 2 mm, 3 mm, 4 mm and 5 mm, a catching unit similar to the above was prepared to catch water particles and grow snow, and I tried to shake off the snow by vibrating a wire rope made of steel.

The diameter of the wire rope is 1 mm, 2 mm and 3 mm.
The snow attached to the wire rope dropped almost completely from the mm-captured body as the wire rope continued to vibrate.

In the case of the wire rope having a diameter of 4 mm and 5 mm, the vibration was greatly attenuated and the vibration was stopped in a short time, so that the attached snow remained on the wire rope and could not be completely removed.

From these results, it is found that when a stranded wire such as a wire rope is used as the capturing body, the diameter d is in a range of 0 mm <d ≦ 3 mm, and the performance of removing attached snow is good and suitable. did.

In addition to metal strands such as stainless steel wire rope and steel wire rope,
A stranded synthetic resin fiber such as a nylon rope or a stranded natural fiber such as a hemp rope may be used.

[0033]

(1) The use of a stranded wire such as a wire rope as a catching body reduces the snow attachment area, so that the snow can be completely and easily wiped off as compared with the conventional catching body. Can be.

Further, since snow does not remain on the capturing body, long-time operation is possible. (2) Since snow does not remain on the capturing body even after long-time operation, it is not necessary to add a snow melting device such as a heater.

(3) By arranging the trapping units vertically, it is possible to make the amount of snowmaking and snowfall comparable to that of the conventional trapping bodies, and the amount of snowmaking and snowfall can be adjusted by the number of arrangements. is there. (4) When snow is formed using an electric field, the snow trapping rate increases due to the unevenness existing on the surface of the wire rope.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an example of a capturing body according to the present invention of a snow making device.

FIG. 2 is an explanatory diagram of an example of a conventional capturing body.

FIG. 3 is an explanatory view of another example of a conventional capturing body.

FIG. 4 is an explanatory view of another example of a conventional capturing body.

[Explanation of symbols]

1 ... capturing body (stranded wire), 2 ... spring, 3 ... capturing body unit.

Claims (3)

[Claims] 1. An apparatus for falling snow, wherein a stranded wire such as a wire rope is used as a catcher for catching, growing and dropping artificial snow. 2. An apparatus for making artificial snow fall, wherein a capture unit in which a plurality of stranded wires are stretched in parallel with each other, such as a wire rope, is used as a capturing body for capturing, growing and dropping artificial snow. The capture body of the device. 3. A method for applying a high voltage to a sprayed supercooled water or ice particles to apply electricity to a supercooled water or ice particle, and then capture the artificial supercooled water or ice particles by using a capturing body, and drop the artificial snow grown on the capturing body. 3. The capturing body according to claim 1 or claim 2, wherein